<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        #canvas {
            margin: auto;
            display: block;
        }
    </style>
</head>

<body>
    <canvas id="canvas"></canvas>
    <script>
        var canvas = document.querySelector("#canvas");
        var WIDTH = 800,
            HEIGHT = 800;

        canvas.width = WIDTH;
        canvas.height = HEIGHT;
        var ctx = canvas.getContext('2d');

        ctx.arc(400, 400, 400, 1.5 * Math.PI, 0.5 * Math.PI,)
        ctx.fillStyle = 'balck'
        ctx.stroke()
        ctx.fill()
        ctx.closePath()

        ctx.beginPath()
        ctx.arc(400, 400, 400, 1.5 * Math.PI, 0.5 * Math.PI, true)
        ctx.strokeStyle = 'black'
        ctx.lineWidth = 1
        ctx.stroke()

        ctx.beginPath()
        ctx.arc(400, 200, 200, 1.5 * Math.PI, 0.5 * Math.PI, )
        ctx.strokeStyle = 'black'
        ctx.lineWidth = 1
        ctx.stroke()
        ctx.fillStyle = 'white'
        ctx.fill()

        ctx.beginPath()
        ctx.arc(400, 200, 75, 0, 2 * Math.PI)
        ctx.strokeStyle = 'black'
        ctx.lineWidth = 1
        ctx.stroke()
        ctx.fillStyle = 'black'
        ctx.fill()

        ctx.beginPath()
        ctx.arc(400, 600, 200, 1.5 * Math.PI, 0.5 * Math.PI, true)
        ctx.strokeStyle = 'black'
        ctx.lineWidth = 1
        ctx.stroke()
        ctx.fillStyle = 'black'
        ctx.fill()

        ctx.beginPath()
        ctx.arc(400, 600, 75, 0, 2 * Math.PI)
        ctx.strokeStyle = 'black'
        ctx.lineWidth = 1
        ctx.stroke()
        ctx.fillStyle = 'white'
        ctx.fill()
    </script>
</body>

</html>